GAS BARRIER LAMINATED FILM AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a gas barrier laminated film having excellent oxygen barrier properties even under a high humidity condition.SOLUTION: The gas barrier laminated film has a film base material 1 and a gas barrier layer 3 including a crosslinked product of a poly(meth)acrylic acid. The crosslinked product is one formed by reaction of (A) an acrylic acid polymer and (B) a sugar alcohol. The acrylic acid polymer (A) is a poly(meth)acrylic acid or a partially neutralized product by neutralizing more than 0 mol% to not more than 25 mol% of carboxyl groups of the poly(meth)acrylic acid with zinc. The number of glycosidic linkage in the structure of the sugar alcohol (B) is not less than 0 to not more than 3. The molar ratio (A/B) of the acrylic acid polymer (A) and the sugar alcohol (B) is 95/5 to 50/50.SELECTED DRAWING: Figure 1